621. Mannheim furnace is used in the manufacture of
Hydrochloric acid
H₂SO₄ by Chamber process
Calcium carbide
Corundum
✅ The correct answer is option A.
Chemical Process MCQs
622. Dichloro diphenyl __________ is the full form of DDT (an insecticide).
Tetrachloroethane
Trichloroethane
Tetrachloromethane
Trichloromethane
✅ The correct answer is option B.
623. A unit operation is exemplified by the process of
Reduction
Desorption
Nitration
Combustion
✅ The correct answer is option B.
624. A good quality coal should have
Low fusion point of ash
High ash content
High sulphur content
None of these
✅ The correct answer is option D.
625. Which of the following is not responsible for causing permanent hardness of water?
Ca(HCO₃)₂
CaCl₂
MgCl₂
None of these
✅ The correct answer is option A.
626. Dacron (or terylene) fibres as compared to nylon’s fibres have
Better heat & acid resistant properties
Poorer resistance to alkalis
Poorer dyeability
All of the above
✅ The correct answer is option D.
627. Sodium bisulphite is used for __________ water.
Deaeration
Dechlorination
Both A & B
Neither A nor B
✅ The correct answer is option C.
628. The ideal pulp for the manufacture of paper should have high __________ content.
Cellulose
Lignin
Both A & B
None of these
✅ The correct answer is option A.
629. Which of the following paper does not require a filler during manufacture?
Bond paper
Writing paper
Blotting paper
Coloured paper
✅ The correct answer is option C.
630. Which of the following is an ore of iron?
Galena
Chalcopyrite
Hematite
Bauxite
✅ The correct answer is option C.